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Drywall Calculator

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Calculate how many drywall sheets you need for walls and ceilings. Includes waste and screw estimates.

Drywall Sheet Calculator | Room & Wall Coverage

This drywall calculator estimates how many sheets are needed for any room, wall, or ceiling installation. When the full tool is activated, you will be able to enter wall dimensions and automatically get sheet count, waste, and screw estimates.

Drywall Sheet Calculator

Units:
meters
meters
meters (floor to ceiling)
Include ceiling if you are boarding the full room.
Choose common board size or set custom.
Use 10–15% for offcuts, openings and mistakes.
meters or feet, based on units
meters or feet, based on units

Enter room size and sheet size to estimate drywall sheets.

This calculator assumes standard rectangular rooms. Irregular shapes, stairwells and complex layouts should be measured separately or checked by a contractor.

Related Calculators

Standard Sheet Sizes

Common drywall sizes:

  • 1200 × 2400 mm
  • 1200 × 3000 mm
  • 1200 × 3600 mm

Area coverage per sheet:

  • 2.88 m² (standard 1200 × 2400)
  • 3.60 m² (1200 × 3000)
  • 4.32 m² (1200 × 3600)

Example

Room perimeter area: 45 m²
Standard sheet coverage: 2.88 m²

45 ÷ 2.88 ≈ 15.6 → 16 sheets

Add 10% waste:
16 × 1.10 ≈ 18 sheets

When to Add Waste

  • Multiple cuts needed for windows and doors
  • Ceiling mounts where board trimming is required
  • Non-square rooms

Screw Estimate (Approx.)

A common drywall estimate:

  • 50–60 screws per 1200 × 2400mm sheet
  • Ceilings require more due to gravity pull

Moisture-Resistant Use

Use green or blue boards for:

  • Bathrooms
  • Kitchens
  • Laundry rooms
  • Basements

Standard boards are fine for living and bedroom spaces.

FAQs

How much waste should I include?
10% for simple layouts, 12–15% for rooms with multiple openings.

Can I mix board sizes?
Yes, mixing can reduce waste and seams.

Do ceilings need different board types?
Ceilings can use thicker board to prevent sagging.